Steering a World War II tank; Gatling gun's speed; power of the samurai sword.

Parts of 15th-century armor; World War I infantry backpack; ingredients of a land mine.

Body armor; accuracy of a medieval crossbow; how World War I pilots shot through their propellers.

Aiming Civil War artillery pieces; how night-vision technology works; how to clear a minefield.

Operating the LCAC; cavalry saddles used in the Old West; how gas masks work.

Maneuverable artillery; musket; Navy airships; precision flying team; pirates; depth charges

How to refuel a fighter jet in mid-air; how ships send messages using signal flags; what soldiers eat.

How fast a Revolutionary War soldier could fire a musket; jousting; how to dig a foxhole.

The ancient Roman pilum is designed to penetrate armor; World War II army radios; how rockets were first used on the battlefield.

The weapons of the Japanese Ninja; how flamethrowers work; what military dogs do.

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Possible gear for troops on tomorrow's battlefields; Marines design their new camouflage pattern; the Stryker.